Insulate the legacy Android client auth code from OpenSSL ABI changes.

net/android/java/src/org/chromium/net/RemoteAndroidKeyStore.java

Index: net/android/java/src/org/chromium/net/RemoteAndroidKeyStore.java
diff --git a/net/android/java/src/org/chromium/net/RemoteAndroidKeyStore.java b/net/android/java/src/org/chromium/net/RemoteAndroidKeyStore.java
index 96037f8e2285dfcd2b3d11d1673acbe41114589a..d0da2c4efd034fe144023aaaf203be1ae2b563fb 100644
--- a/net/android/java/src/org/chromium/net/RemoteAndroidKeyStore.java
+++ b/net/android/java/src/org/chromium/net/RemoteAndroidKeyStore.java
@@ -116,6 +116,13 @@ public class RemoteAndroidKeyStore implements AndroidKeyStore {
         return 0;
     }
 
+    @Override
+    public Object getOpenSSLEngineForPrivateKey(AndroidPrivateKey privateKey) {
+        // This should not be called as it's only for older versions of Android.
+        assert false;
+        return null;
+    }
+
     public AndroidPrivateKey createKey(String alias) {
         try {
             int handle = mRemoteManager.getPrivateKeyHandle(alias);